# Question #15216

##### 1 Answer

Sep 19, 2017

90 L of water will reduce to 30% acid concentration

#### Explanation:

90L (60%) + xL(0%) = (90 + x)L(30%)

this equation includes the volume and acid proportion

the acid equation is:

54 L + x(0) = 27 L + 0.30x L

Since all terms are in Litres, we can dispense with the units

54 = 27 + 0.30x

subtracting 27 from both sides:

27 = 0.30x

divide both sides by 0.3

90 = x